• Title/Summary/Keyword: 적녹청 색상

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Design and Analysis of a Red-Green-Blue Beam Combiner Based on Multimode Waveguides (다중 모드 도파로를 이용한 적녹청 빔 합파기 설계 및 분석)

  • Chung, Youngchul
    • Korean Journal of Optics and Photonics
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    • v.31 no.2
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    • pp.105-110
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    • 2020
  • A compact beam combiner based on two-mode interference (TMI) in multimode waveguides is proposed, and its feasibility is shown through simulation with the three-dimensional beam propagation method. The input waveguides are separated by about 1 ㎛ at the interface with the multimode waveguide, so that the fabricated waveguide pattern is well repeated. The power transmission to the output port from the red, green, and blue input port is 93.5%, 94%, and 93%, respectively. When the wavelength deviation from a center wavelength is 10 nm, the power transmission is maintained to be greater than 90%. When the waveguide width error is 40 nm, the power transmission is maintained to be greater than 85% for all the three colors. The polarization dependence of the beam combiner is almost negligible, and its size is as tiny as 0.02 × 4 ㎟.

Study on an Extraction Method for a Fuel Rod Image and a Visualization of the Color Information in a Sectional Image of a Spent Fuel Assembly (사용후핵연료집합체 영상에서 핵연료봉 영상 추출방법과 색상정보의 가시화에 관한 연구)

  • Jang, Ji-Woon;Shin, Hee-Sung;Youn, Cheung;Kim, Ho-Dong
    • Journal of the Korean Society for Nondestructive Testing
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    • v.27 no.5
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    • pp.432-441
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    • 2007
  • Image processing methods for an extraction of a nuclear fuel rod image and visualization methods of the RGB color data were studied with a sectional image of spent fuel assembly. The fuel rod images could be extracted by using a histogram analysis, an edge detection and RGB rotor data. In these results, a size of the spent fuel assembly could be measured by using a histogram analysis method and a shape of the spent fuel rod could be observed by using an edge detection method. Finally, a various analyses were established for status of the spent fuel assembly by realized various 3D images for the color data in an image of a spent fuel assembly.

Edge Detection in Color Image Using Color Morphology Pyramid (컬리 모폴로지 피라미드를 이용한 컬러 이미지의 에지 검출)

  • 남태희;이석기
    • Journal of the Korea Society of Computer and Information
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    • v.6 no.2
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    • pp.65-69
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    • 2001
  • Edge detection is the most important process that belongs to the first step in image recognition or vision system and can determine the efficiency valuation. The edge detection with color images is very difficult. because color images have lots of information that contain not only general information representing shape, brightness and so on but also that representing colors. In this paper, we propose architecture of universalized Color Morphological Pyramids(CMP) which is able to give effective edge detection. Image pyramid architecture is a successive image sequence whose area ratio 2$\^$-1/(ι= 1, 2, . . . ,N) after filtering and subsampling of input image. In this technique, noise removed by sequential filtering and resolution is degraded by downsampling using CMP in various color spaces. After that, new level images are constructed that apply formula using distance of neighbor vectors in close level images and detection its image.